These points are also on the negative side of the x axis, at -pi/4 and -pi/2. When we move along the x axis, notice what happens to the y value. On the left side of zero, tangent is negative. At x=-pi/4, tangent=-1.
The Independent Online. David Cameron may have called a referendum on the EU to blackmail Europe, according to Vladimir Putin. The Russian president also questioned Mr Cameronâs decision to call the vote, as it has caused a âgreat problemâ.
a. A. As the price to deter a westward move of Ukraine, Russia has made an offer that the Ukrainian president has found impossible to turn down, if he ever contemplated seriously tying his country to the EU. This is generally hailed as a master coup by President Putin and a great relief for President Yanukovych.